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Proof step 6 from proof newrefs-rest (previous step)

newref_list(n + 1, st) .first ∈ newref_list(n + 1, st) .rest ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ newref_list(n + 1, st) = newref(st) + newref_list(n, st[newref(st) -- 0 ', noval])
Proof step 5:
(newref(st) + newref_list(n, st[newref(st) -- 0 ', noval])) .first ∈ (newref(st) + newref_list(n, st[newref(st) -- 0 ', noval])) .rest ⊦

Rule argument

[crewrite-arg: newrefs-succ, F, [st, n] → [st, n]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, n)]]